This is one of my favorite pieces because this is one of my favorite things to learn.
Investigation: 1 Page: 15 Name: Cassidy Duncan Date: 12/9/10 Book: Bits and Pieces 2 Problem to solve: Reflection 1
My first strategy for estimating fraction sums is to find what benchmark fraction it is close to then you add both of the benchmark fractions that both of them are close to. A benchmark fraction is a fraction or number a fraction is close to and is also not exact. For example, 6/7 and 5/12, 6/7 is close to 1 and 5/12 is close to half. So 1+ ½ is close to 1 ½. Another strategy for estimating fraction sums is you overestimate on one fraction that is less than half and fill it in with another fraction that is only less than half. You would have then an overestimation for two fractions. For example 2¼+ 1/3 I rounded 2 ¼ to 3 and if I added 1/3 then my rounding would have already covered 1/3 so I would just keep it to 3.
I decide to use overestimation when I don’t want to run out of supplies. For example, if I needed to make a dress and the instructions say I need 7 7/13 yards of fabric. I would overestimate because if I measured wrong then I would have to restart and buy new fabric. Also because when I’m done with the dress all the leftover fabric I can just cut off. I would decide to use underestimation when you only have 1 cup of milk and you need 1 1/6 cups you don’t need to get more. You can just cut back in the ingredients and keep the proportions the same.
This is one of my favorite pieces because this is one of my favorite things to learn.
Investigation: 1
Page: 15
Name: Cassidy Duncan
Date: 12/9/10
Book: Bits and Pieces 2
Problem to solve: Reflection 1